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Chemistry CBSE Live product
Class 9
Matter in our surroundings
Annual Revision I - Matter in our surroundings
2.
Effects of temperature on states
Question:
2
m.
Select the correct answer:
1.
Dry ice, when left exposed to air, slowly disappears. Which of the following equations correctly represents this change?
\(Co_2(s) \to Co_2(l)\)
\(Co_2(s) \to Co_2(g)\)
\(Co_2(l) \to Co_2(g)\)
\(NH_3(s) \to NH_3(l)\)
2.
Which of the following statements is correct about freezing?
Liquid particles lose kinetic energy due to decrease in temperature to become solid
Gas particles lose kinetic energy to become solid
Liquid particles gain kinetic energy due to decrease in temperature to become solid
Temperature of liquid rises during freezing
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